四川农业大学学报 ›› 2022, Vol. 40 ›› Issue (2): 220-226.doi: 10.16036/j.issn.1000-2650.202109029

• 植物营养与保护 • 上一篇    下一篇

静电喷雾对农药飘移及沉积分布的影响

贡常委1, 刘越2, 马钰1,3, 詹小旭1, 周增梅4, 朱新成5, 王学贵1,*   

  1. 1.四川农业大学农学院/无公害农药研究实验室,成都 611130;
    2.安阳全丰生物科技有限公司/农业农村部航空植保重点实验室,河南 安阳 455000;
    3.甘肃省陇南市经济作物技术推广总站,甘肃 陇南 746000;
    4.四川省筠连县农业农村局,四川 宜宾 645250;
    5.成都绿金高新技术股份有限公司,成都 610023
  • 收稿日期:2021-09-26 出版日期:2022-04-30 发布日期:2022-05-05
  • 通讯作者: *王学贵,教授,博士生导师,主要从事农药毒理学研究,E-mail:wangxuegui@sicau.edu.cn。
  • 作者简介:贡常委,博士研究生,主要从事农药毒理学研究,E-mail:youguqiu@163.com。
  • 基金资助:
    国家重点研发计划项目(2018YFD0200300)

Influence of Electrostatic Spraying on Drift and Deposition Distribution

GONG Changwei1, LIU Yue2, MA Yu1,3, ZHAN Xiaoxu1, ZHOU Zengmei4, ZHU Xincheng5, WANG Xuegui1,*   

  1. 1. College of Agronomy, Non-Pollution Pesticide Research Laboratory/Sichuan Agricultural University, Chengdu 611130, China;
    2. Key Laboratory of Aviation Plant Protection of the Ministry of Agriculture and Rural Areas, Anyang Quanfeng Biotechnology Co., Ltd. Anyang 455000,Henan, China;
    3. Longnan Economic Crops Technology Promotion Station, Longnan 746000, Gansu, China;
    4. County Agriculture and Rural Bureau of Junlian in Sichuan Province, Yibin 645250,Sichuan, China;
    5. Chengdu Green Gold High-Tech Co., Ltd., Chengdu 610023, China
  • Received:2021-09-26 Online:2022-04-30 Published:2022-05-05

摘要: 【目的】 旨在揭示静电技术对喷雾雾化性能、理化性质和沉降等方面影响,为静电喷雾技术在作物病虫草害防控应用提供依据。【方法】 采用激光粒度系统比较分析静电喷雾和非静电喷雾的雾滴粒径特征,采用铂金环法和座滴法分别评测静电喷雾和非静电喷雾雾滴的表面张力和其与稗草叶片的接触角,在开放式风洞中采用麦拉片、相片纸中收集不同喷雾方式的地面飘移量及靶标的沉积量,评价静电喷雾技术对飘移沉积分布和靶标沉积量的影响。【结果】 在0.3 MPa喷雾压力下,比较静电喷雾和非静电喷雾的雾滴粒径特征,发现静电喷雾的体积中径D50高于非静电喷雾的,雾滴直径D90却低于非静电喷雾的,但差异不显著;分布跨度S显著低于非静电喷雾的,两者的ΦVol<150 μm 差异不显著,而静电喷雾粒径分布更加均匀。比较两者的理化性质发现,静电喷雾雾滴的表面张力及其与稗草叶片在200、400和600 ms的接触角均显著低于非静电喷雾。进一步采用Depositscan分析比较相片纸上飘移沉积规律,喷雾方式对飘移沉积雾滴D50的影响均达到显著水平,且非静电喷雾显著高于静电喷雾,但喷雾方式对地面飘移量和沉积量的影响均不显著;飘移距离对雾滴D50、飘移量和沉积量的影响达到显著水平,飘移距离为1 m的D50、飘移量和沉积量均显著高于飘移距离为3 m处理。收集靶标上的沉积量,静电喷雾沉积靶标的量显著高于非静电喷雾处理,但是两者的防飘移效果差异不显著。【结论】 相对于非静电喷雾,静电喷雾能够显著降低雾滴粒径的分布跨度,增加雾滴的分布均匀性,降低雾滴直径D90,降低表面张力和其与稗草叶片的接触角,增加雾滴靶标沉积率,表明静电喷雾技术在防控作物病虫草害的应用上具有较大的潜力。

关键词: 静电喷雾, 分布跨度, 体积中径, 表面张力, 接触角, 飘移分布

Abstract: 【Objective】 The objective is to clarify the characteristics atomization performance, physical and chemical properties and deposition of droplet, and to provide the basis for the application of electrostatic spray technology in the crop disease, insect and grass control. 【Method】 In this paper, a laser particle size analyzer is used to analyze and compare the droplet size between the electrostatic spray and non-electrostatic spray. The platinum ring method and the sessile drop method are used to evaluate the surface tension and its contact angle with the blade of Echinochloa crusgalli (L.) between electrostatic spray and non-electrostatic spray. Mylar and photo paper are used in the cave to collect the amount of ground drift of different spray methods to evaluate the influence of electrostatic spray technology on the distribution of droplet drift and deposition; the amount of deposit on the target is also measured. 【Result】 Under 0.3 MPa spray pressure, comparing the droplet characteristics between electrostatic spray and non-electrostatic spray, this study found that the volume median diameter D50 of electrostatic spray is higher than that of non-electrostatic spray, butits droplet diameter D90 is lower. The distribution span S of electrostatic spray is significantly lower than that of non-electrostatic spray. The difference of ΦVol<150 μm is not significant, and the particle size distribution of the electrostatic spray is more uniform. Comparing the physical and chemical properties between electrostatic spray and non-electrostatic spray, this paper found that the surface tension of electrostatic spray droplets and their contact angles with the blade of E. crusgalli (L.) at 200, 400 and 600 milliseconds are significantly lower than those of non-electrostatic spray. Then mylar and photo paper are adopted to compare drift deposition distribution law of electrostatic spray and non-electrostatic spray, the influence of spraying method on drift deposition droplet D50 has reached a significant level, non-electrostatic spray is significantly higher than electrostatic spray, however, the difference of the amount of drift and deposition between electrostatic spray and non-electrostatic spray is not significant; The influence of drift distance on the D50, drift and deposition has reached a significant level. D50, drift and deposition at a drift distance of 1 m are significantly higher than those at the drift distance of 3 m. The amount of deposition on the E. crusgalli (L.) is significantly higher than that of non-electrostatic spraying, however, the difference of anti-drift effect between electrostatic spray and non-electrostatic spray is not significant. 【Conclusion】 Compared with non-electrostatic spraying, electrostatic spraying can significantly reduce the distribution span of the droplet size, increase its uniformity, decrease the D90 of the droplet, reduce the surface tension and its contact angle with the blade of E. crusgalli (L.), and increase the target deposition rate. The results indicate that electrostatic spray technology has potential application in preventing and controlling crop diseases, pests and weeds.

Key words: electrostatic spray, distribution span, D50, surface tension, contact angle, drift distribution

中图分类号: 

  • S49